Last night, Twitter and Facebook were awash with sadness because Tony Hart, a much-loved children's TV presenter, had died.
The only problem with this outpouring of grief is that he actually died in 2009, aged 83.
This person tweeted the bad news after seeing someone post it on Facebook.
When someone pointed out Hart died six years ago, like many, many others, he admitted he didn't check the date.
A great number of people have been sharing this Guardian article or this BBC one either without a) noticing the dates, or b) reading them at all.
This was one of several people who reminisced about sending Hart a drawing.
Even Americans were moved.
For a time, it was the thing people were tweeting about.
Even Nadhim Zahawi, MP for Stratford-On-Avon, was taken in, retweeting this message of condolence.
The people who attended his funeral must have been slightly confused.
Hart's Plasticine sidekick, Morph, was moved to tweet that Hart was in fact already dead.
Someone mocked up this headstone for Hart, commemorating both his real death and his 2015 fake Twitter death.
And now lots of people feel a bit silly.
But the main thing is that people who grew up in the '70s, '80s, and '90s have really fond memories of Tony Hart and are sad that he's dead.
Even if he died six years ago.
Patrick Smith is a senior reporter for BuzzFeed News and is based in London.
Contact Patrick Smith at email@example.com.
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